CVE-2020-5236— Agendaless Waitress 资源管理错误漏洞
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I. CVE-2020-5236の基本情報
脆弱性情報
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脆弱性タイトル
Catastrophic backtracking in regex allows Denial of Service in Waitress
ソース: CVE Program / CVE List V5
脆弱性説明
Waitress version 1.4.2 allows a DOS attack When waitress receives a header that contains invalid characters. When a header like "Bad-header: xxxxxxxxxxxxxxx\x10" is received, it will cause the regular expression engine to catastrophically backtrack causing the process to use 100% CPU time and blocking any other interactions. This allows an attacker to send a single request with an invalid header and take the service offline. This issue was introduced in version 1.4.2 when the regular expression was updated to attempt to match the behaviour required by errata associated with RFC7230. The regular expression that is used to validate incoming headers has been updated in version 1.4.3, it is recommended that people upgrade to the new version of Waitress as soon as possible.
ソース: CVE Program / CVE List V5
CVSS情報
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
ソース: CVE Program / CVE List V5
脆弱性タイプ
未加控制的资源消耗(资源穷尽)
ソース: CVE Program / CVE List V5
脆弱性タイトル
Agendaless Waitress 资源管理错误漏洞
ソース: CNNVD (China National Vulnerability Database)
脆弱性説明
Waitress是一款用于Python的WSGI（Web服务器网关接口）服务器。 Agendaless Waitress 1.4.2版本中存在资源管理错误漏洞。该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。
ソース: CNNVD (China National Vulnerability Database)
CVSS情報
N/A
ソース: CNNVD (China National Vulnerability Database)
脆弱性タイプ
N/A
ソース: CNNVD (China National Vulnerability Database)
影響を受ける製品
II. CVE-2020-5236の公開POC
| # | POC説明 | ソースリンク | Shenlongリンク |
|---|---|---|---|
| 1 | Waitress 1.4.2 ReDoS - CVE-2020-5236 (Blog Sample Code) | https://github.com/motikan2010/CVE-2020-5236 | POC詳細 |
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CVE-2020-5236 补丁与修复 (1)
CVE-2020-5236 厂商安全公告 (1)
- https://github.com/Pylons/waitress/security/advisories/GHSA-73m2-3pwg-5fgcx_refsource_CONFIRM
IV. 関連脆弱性
同じ製品: Waitress
- CVE-2024-49768
Waitress has request processing race condition in HTTP pipel - CVE-2024-49769
Waitress has a denial of service leading to high CPU usage/r - CVE-2022-31015
Uncaught Exception (due to a data race) leads to process ter - CVE-2022-24761
HTTP Request Smuggling in waitress - CVE-2019-16792
HTTP Request Smuggling: Content-Length Sent Twice in Waitres
同じベンダー: Pylons
- CVE-2026-44889
WebOb: Location header normalization during redirect leads t - CVE-2024-49768
Waitress has request processing race condition in HTTP pipel - CVE-2024-49769
Waitress has a denial of service leading to high CPU usage/r - CVE-2024-42353
WebOb's location header normalization during redirect leads - CVE-2023-40587
Pyramid static view path traversal up one directory
同じ弱点: CWE-400
- CVE-2026-66144
Apache Neethi: Remote PolicyReference fetch lacks resource b - CVE-2026-66143
Apache Neethi: Missing global alternative-output budget acro - CVE-2026-66142
Apache Neethi: Uncontrolled recursion in policy processing - CVE-2026-14257
brace-expansion DoS via unbounded expansion length causing a - CVE-2026-63263
Uncontrolled Resource Consumption in Elasticsearch Leading t
V. CVE-2020-5236へのコメント
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